\begin{tabular}{lcccc} \hline
 & (1) & (2) & (3) & (4) \\
VARIABLES & linstall\_percDS\_pop & linstall\_percDS\_pop & linstall\_percDS\_pop & linstall\_percDS\_pop \\ \hline
 &  &  &  &  \\
price &  & 20.12*** & 19.89*** &  \\
 &  & (0.341) & (0.336) &  \\
A\_t &  & 0.00111*** & 0.00112*** &  \\
 &  & (1.37e-05) & (1.32e-05) &  \\
kwh\_ben & 1.87e-05*** & 4.88e-05*** &  &  \\
 & (1.87e-06) & (1.99e-06) &  &  \\
cost & -7.34e-05*** & -1.51e-05*** & 5.33e-07 & 5.33e-07 \\
 & (4.20e-06) & (4.11e-06) & (4.25e-06) & (4.25e-06) \\
cost\_ben & 1.09e-05*** & 1.90e-05*** &  &  \\
 & (2.03e-06) & (2.09e-06) &  &  \\
unit\_ben & 1.63e-05*** & 1.19e-05*** &  &  \\
 & (4.51e-06) & (4.38e-06) &  &  \\
CollPerc\_t & 1.041*** & 1.179*** & 1.187*** &  \\
 & (0.0491) & (0.0488) & (0.0487) &  \\
Pol\_t & -0.509*** & -0.0752 & -0.130* &  \\
 & (0.0739) & (0.0742) & (0.0730) &  \\
price\_ben & 0.000260*** &  &  &  \\
 & (2.45e-06) &  &  &  \\
skwh &  &  & 5.285*** &  \\
 &  &  & (0.195) &  \\
scost &  &  & 0.554*** &  \\
 &  &  & (0.0478) &  \\
sunit &  &  & 0.000723*** &  \\
 &  &  & (7.44e-05) &  \\
price\_std &  &  &  & 0.540*** \\
 &  &  &  & (0.00911) \\
A\_t\_std &  &  &  & 0.757*** \\
 &  &  &  & (0.00898) \\
skwh\_std &  &  &  & 0.248*** \\
 &  &  &  & (0.00918) \\
scost\_std &  &  &  & 0.104*** \\
 &  &  &  & (0.00901) \\
sunit\_std &  &  &  & 0.0922*** \\
 &  &  &  & (0.00948) \\
CollPerc\_t\_std &  &  &  & 0.234*** \\
 &  &  &  & (0.00959) \\
Pol\_t\_std &  &  &  & -0.0202* \\
 &  &  &  & (0.0114) \\
Constant & -7.660*** & -14.53*** & -15.01*** & -15.01*** \\
 & (0.115) & (0.142) & (0.144) & (0.144) \\
 &  &  &  &  \\
Observations & 41,776 & 41,776 & 41,776 & 41,776 \\
 R-squared & 0.394 & 0.431 & 0.437 & 0.437 \\ \hline
\multicolumn{5}{c}{ Robust standard errors in parentheses} \\
\multicolumn{5}{c}{ *** p$<$0.01, ** p$<$0.05, * p$<$0.1} \\
\end{tabular}
